In a playground there is a merry-go-round of mass 120 kg and radius 4 m . The radius of gyration is 3 m . A child of mass 30 kg runs at a speed of 5 m / sec tangent to the rim of the merry-go-round when it is at rest and then jumps on it. Neglect friction and find the angular velocity of the merry-go-round and child
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C
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